diff --git a/charming/src/element/border_type.rs b/charming/src/element/border_type.rs
index 54e3ddc..051a9ae 100644
--- a/charming/src/element/border_type.rs
+++ b/charming/src/element/border_type.rs
@@ -1,4 +1,4 @@
-use serde::{Serialize, Deserialize};
+use serde::{Deserialize, Serialize};
 
 #[derive(Serialize, Deserialize, Clone, Debug)]
 #[serde(rename_all = "snake_case")]
diff --git a/charming/src/element/color.rs b/charming/src/element/color.rs
index 2a7a160..e0ad8cd 100644
--- a/charming/src/element/color.rs
+++ b/charming/src/element/color.rs
@@ -1,5 +1,5 @@
 use serde::ser::{SerializeStruct, Serializer};
-use serde::{Serialize, Deserialize};
+use serde::{Deserialize, Serialize};
 
 #[derive(Serialize)]
 #[serde(rename_all = "snake_case")]
diff --git a/charming/src/element/item_style.rs b/charming/src/element/item_style.rs
index d530cd0..8b5eb97 100644
--- a/charming/src/element/item_style.rs
+++ b/charming/src/element/item_style.rs
@@ -1,5 +1,5 @@
-use serde::{Serialize, Deserialize};
 use super::{border_type::BorderType, color::Color};
+use serde::{Deserialize, Serialize};
 
 #[derive(Serialize, Deserialize, Clone, Debug)]
 #[serde(rename_all = "camelCase")]
diff --git a/charming/src/element/text_style.rs b/charming/src/element/text_style.rs
index 1ab66a0..78dd854 100644
--- a/charming/src/element/text_style.rs
+++ b/charming/src/element/text_style.rs
@@ -25,7 +25,7 @@ pub struct TextStyle {
 
     #[serde(skip_serializing_if = "Option::is_none")]
     align: Option<String>,
-    
+
     #[serde(skip_serializing_if = "Option::is_none")]
     padding: Option<[f64; 4]>,
 }
diff --git a/charming/src/series/sankey.rs b/charming/src/series/sankey.rs
index a14d22b..7013cd3 100644
--- a/charming/src/series/sankey.rs
+++ b/charming/src/series/sankey.rs
@@ -2,7 +2,7 @@ use serde::{Deserialize, Serialize};
 
 use crate::{
     datatype::CompositeValue,
-    element::{Emphasis, Label, LineStyle, Orient, ItemStyle},
+    element::{Emphasis, ItemStyle, Label, LineStyle, Orient},
 };
 
 #[derive(Serialize)]
@@ -29,7 +29,10 @@ pub struct SankeyNode {
 }
 
 impl SankeyNode {
-    pub fn new<S>(name: S) -> Self where S: Into<String> {
+    pub fn new<S>(name: S) -> Self
+    where
+        S: Into<String>,
+    {
         Self {
             name: name.into(),
             value: None,
@@ -54,8 +57,8 @@ impl SankeyNode {
 }
 
 impl<S> From<S> for SankeyNode
-    where
-        S: Into<String>,
+where
+    S: Into<String>,
 {
     fn from(name: S) -> Self {
         SankeyNode {
diff --git a/gallery/src/line/line_gradient.rs b/gallery/src/line/line_gradient.rs
index 9fe1034..3db25c4 100644
--- a/gallery/src/line/line_gradient.rs
+++ b/gallery/src/line/line_gradient.rs
@@ -99,11 +99,7 @@ pub fn chart() -> Chart {
                 .max((data_list.len() - 1) as f64),
         )
         .x_axis(Axis::new().data(data_list.to_vec()))
-        .x_axis(
-            Axis::new()
-                .data(data_list.to_vec())
-                .grid_index(1),
-        )
+        .x_axis(Axis::new().data(data_list.to_vec()).grid_index(1))
         .y_axis(Axis::new())
         .y_axis(Axis::new().grid_index(1))
         .grid(Grid::new().bottom("60%"))